Independent fire-alarm.



, A. A. CLIVE.

-INDEPENDENT FIRE ALARM.

APPLlCATION FILED NOV.2B| 1911. RENEWED MAY 17.1916.

, Patented July 4, 1916.

M L WEE em up STATES PATENT ormon.

ALBERT A. CLIVE, 015 LOS ANGELES, CALIFORNIA, ASSIGNOR TO AMERICAN FIREALARM COMPANY, OF LOS ANGELES, CALIFORNIA, A CORPORATION OF CALI-FORNIA.

INDEPENDENT FIRE-ALARM.

Specification of Lettel's Patent.

Application filed November 28, 1911, Serial No. 662,940. Renewed May 17,1916. Serial No. 98,213.

To all whom it may concern Be it known that I, ALBERT A. CLIVE, acitizen of the United States, residing at Los Angeles, in the county ofLos Angeles and State of California, have invented a new and usefulIndependent Fire-Alarm, of which the following is a specification.

An object of this invention is to provide a simple, compact andinexpensive device which can be installed with great ease andconvenience wherever desired throughout buildings for the purpose ofautomatically giving an alarm in case of fire.

In carrying out the invention spring driven or weight driven clock-workmay be employed to operate the signal device but the spring drivenclock-work is preferred. Various forms of construction may be employed.

The accompanying drawings illustrate the invention.

Figure 1 is a front View of the alarm as it appears when set; a portionof the gong being broken to expose parts that would otherwise be hidden.Fig. 2 is an elevation from the right of Fig. 1; the gong being broken.Fig. 3 is a fragmental sectional elevation on enlarged scale from line12 Fig. 1, looking toward the right.

The frame may be of any suitable character, and as shown may include aplate 1 which may be of wood and the base plate 2, standards 3 and topplate 4: of the clockwork which may be constructed like an ordinaryautomatic door bell, the gong 5 of which is screwed onto the end of thepost 6 to which the inner end of the spring 7 is fixed; the outer end ofsaid spring being connected with the spur-wheel 8 that acts upon thepinion 9 of the escapement wheel 10 controlled by the escapement 11 thatis fixed to the verge 12 which is pivotally mounted in the plates 2 and1 and to which is rigidly fixed the bent stem 13 'of the hammer 14. Theescapement is a rebounding escapement and the clock-work, the hammer andhammer stem are all inclosed inside the gong 5, and the clock-workthrough its escapement normally operates the signal device composed ofthe hammer to cause it to sound the alarm on the gong 5. A stop adaptedto normally release the escapement and allow the signal to be given isprovided and is held in escapement-stopping position by a fuse. In theform shown in the drawings, the stop consists of a pivoted bar 15pivotally mounted on a horizontal pin 16 seated in the plate 1. A fusesupport 17 is fixed to the plate 1 and projects into position below thefree end of the escapement stop formed by the pivoted bar 15, and isprovided on its upper side with a socket 18- to form a fuse seatdirectly below a socket 19 that forms a fuse seat in the free end of thepivoted escapement stop bar 15. The fuse 20 consists of a short piece ofwire composed of some readily fusible metal or other suitable materialthe melting point of which is within the temperature range of the hotgases depended upon for operation of ,the alarm; as, for instance, atemperature of say 125 Fahrenheit. The plate 1 may be per forated as at21 or otherwise provided with supporting means, and may be fastened by ascrew, nail or pin near the ceiling at a selected place whereby hotgases from an incipient fire would first collect. 7

To set the alarm, the escapement stop 15, which is movable toward andfrom the hammer in the way of the hammer, will be brought upagainst thehammer stem 13 to prevent the operation of the clock-work and the fusewire 20 will be inserted into the sockets 18 and 19 and then the alarmthus set will be hung or otherwise mounted where the hot gases willreach the fuse. In case of fire the hot gases that reach the alarmstation will melt the fuse, thereby allowing the alarm bar or escapementstop 15 to be thrown out of the way by the force of the escapement andthereupon the alarm is set in operation. By preference the parts arearranged, as shown inthe drawings so that the escapement stop is adaptedto normally be actuated by gravity to release the escapement; suchrelease in the instance shown being effected by the force of gravity assoon as the fuse is melted.

The fuse 20 preferably consists of a single-limbed element which asshown in the drawings is under compression by weight of the stop-15 andexpansive force of the spring 7, such compression tending to bend thefuse when the fuse is subjected to the action of the heated ases beforecomplete melting of the fuse tafikes place, thus minimizing the heatnecessary to effect operation of the alarm and in efiect producing afuse of maximum sensitiveness to heat.

I claim 1. The combination with a frame; of clock work carried by theframe; a signal device operated by the clock work; a horizontal pivotpin; a bar pivoted at one end on the pin and adapted at its free portionto form a stop for the clock work and also to normally fall by gravityout of stopping position; a fuse support; and a fuse to hold the bar inclock-work stopping position.

2. The combination with a frame; of

. clock work carried by the frame; a signal device operated by the clockwork; a horizontal pivot pin; a bar pivoted at one end on the pin andprovided with a socket at its free portion and adapted at its freeportion to form. a stop for the clock work and also to normally fall bygravity out of stopping position; a fuse support provided with a socket;and a fuse wire in the socket to hold the bar in clock-work stoppingposition.

In testimony whereof, I have hereunto set my hand at Los Angeles,California, this 22d day of November, 1911.

JAMES R. TOWNSEND, L. BELLE R1011.

Copies of this patent may be obtained for five cents each, by addressingthe Commhnoner '0! Yatents Washington, D. 0."

